Let’s solve each multiplication problem using the area model step by step. We’ll break each number into tens and ones, multiply the parts, then add them up.
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1. 34 × 23
Break 34 → 30 + 4
Break 23 → 20 + 3
Now fill in the boxes:
- Top left: 30 × 20 =
600
- Top right: 30 × 3 =
90
- Bottom left: 4 × 20 =
80
- Bottom right: 4 × 3 =
12
Add them:
600 + 90 = 690
690 + 80 = 770
770 + 12 =
782
✔ Final answer for 34 × 23 =
782
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2. 40 × 32
Break 40 → 40 + 0 (or just keep as 40)
Break 32 → 30 + 2
Boxes:
- Top left: 40 × 30 =
1200
- Top right: 40 × 2 =
80
- Bottom left: 0 × 30 =
0
- Bottom right: 0 × 2 =
0
Add them:
1200 + 80 = 1280
1280 + 0 + 0 =
1280
✔ Final answer for 40 × 32 =
1280
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3. 58 × 27
Break 58 → 50 + 8
Break 27 → 20 + 7
Boxes:
- Top left: 50 × 20 =
1000
- Top right: 50 × 7 =
350
- Bottom left: 8 × 20 =
160
- Bottom right: 8 × 7 =
56
Add them:
1000 + 350 = 1350
1350 + 160 = 1510
1510 + 56 =
1566
✔ Final answer for 58 × 27 =
1566
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4. 83 × 19
Break 83 → 80 + 3
Break 19 → 10 + 9
Boxes:
- Top left: 80 × 10 =
800
- Top right: 80 × 9 =
720
- Bottom left: 3 × 10 =
30
- Bottom right: 3 × 9 =
27
Add them:
800 + 720 = 1520
1520 + 30 = 1550
1550 + 27 =
1577
✔ Final answer for 83 × 19 =
1577
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5. 34 × 44
Break 34 → 30 + 4
Break 44 → 40 + 4
Boxes:
- Top left: 30 × 40 =
1200
- Top right: 30 × 4 =
120
- Bottom left: 4 × 40 =
160
- Bottom right: 4 × 4 =
16
Add them:
1200 + 120 = 1320
1320 + 160 = 1480
1480 + 16 =
1496
✔ Final answer for 34 × 44 =
1496
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6. 62 × 15
Break 62 → 60 + 2
Break 15 → 10 + 5
Boxes:
- Top left: 60 × 10 =
600
- Top right: 60 × 5 =
300
- Bottom left: 2 × 10 =
20
- Bottom right: 2 × 5 =
10
Add them:
600 + 300 = 900
900 + 20 = 920
920 + 10 =
930
✔ Final answer for 62 × 15 =
930
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Final Answer:
34 × 23 = 782
40 × 32 = 1280
58 × 27 = 1566
83 × 19 = 1577
34 × 44 = 1496
62 × 15 = 930
Parent Tip: Review the logic above to help your child master the concept of area model multiplication worksheet 4th grade.